[louisdub11]

Hello everyone !

I am currently doing my master thesis, and the subject is doing a simulation of a scroll expander. For that I had to generate a mesh in ICEM CFD, and I have to make the simulation with CFX software.

So far, I have generated a tetra mesh on ICEM, imported this mesh in CFX-Pre, and I have done a "static" simulation in CFX Solver and CFX-Post (You can see some of the results in the pictures below).

My question is: how could I do the dynamic mesh and the movement of the orbiting scroll in CFX-Pre?

I'm trying to put the movement equations in the moving wall domain, but I'm not sure if I have the correct approach, and haven't found relevant answers on the internet (And I have 1 month left for my thesis so I'm getting a bit nervous ).

Mesh.jpg

Convergence.PNG

Velocity profile.jpg

Capture.PNG

Here you can see the equations I'm trying to enter:

moving scroll1.PNG

When I enter these equations, I get the error:

Bad expression value '-2*cos(t*2*pi*5)*2*pi*5' detected in parameter 'Displacement Y Component' in object '/FLOW:Flow Analysis 1/DOMAIN:Scroll Flow/BOUNDARY:moving scroll/BOUNDARY CONDITIONS/MESH MOTION/DISPLACEMENT'.
CEL error:
The dimensions of the argument to function 'cos' are inconsistent with expected dimensions.
Argument dimensions resolve to 's'; expected 'rad'.

If someone has a clue about how I should do, I would be very grateful !

Don't hesitate to ask me if you need more details !

Thanks,

Louis